[undertow-dev] Real path default resolution

[Brad Wood]

I'm using Undertow for the deployment of Adobe ColdFusion and Lucee Server
sites, which for historical reasons and convenience, keeps two separate
folders for the WAR/web-inf and the actual web root where content is served
from.

In your typical J2EE setup, the real path "/" is the parent of "/WEB-INF"
but that is not the case for me and we use a custom resource manager with
great success to handle the correct resolution of paths in the server.

We have one issue however in the event of path resolution for non existent
files such as "/WEB-INF/cfform/logs/flex.log" which doesn't exist yet the
first time a server comes up.  Since it doesn't exist, my custom resource
manager (who knows where the real WEB-INF lives) returns null as it should
which leaves it up to this line of code:
https://github.com/undertow-io/undertow/blob/ff4c9cf37872cb96070ba6a2fcbbaa6df291e390/servlet/src/main/java/io/undertow/servlet/spec/ServletContextImpl.java#L389
to "guess" where the file would exist if it were to be created.  Since it
roots it in the real path of "/", it guessing incorrectly in my case and
the result is I have folders and files created in the wrong directory.

This is rather tricky since my custom resource manager would tell the
servlet context exactly where "/WEB-INF" is if it were to ask that
question, but since it asks for "/", a different answer is given.
Interestingly enough, had the example provided in the final comment of this
ticket been followed, it would work for me since it progressively attempts
to resolve the path while peeling back directories one at a time until it
finds one that exists.
https://issues.jboss.org/browse/UNDERTOW-373?focusedCommentId=13036336&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-13036336

There's no comment on the ticket as to why that solution wasn't used, but I
would presume to avoid additional disk hits.  I'm looking for ways that I
can still control how /WEB-INF is resolved with my custom resource manager,
even for non-existent paths.  Save the progressive searching I mentioned in
the previous paragraph, the only other solution I can think of is for the
servlet contexts' getRealPath() to detect when a non existent path begins
with /WEB-INF and asking the resource manager to resolve /WEB-INF in that
case instead of / so it can get a more specific answer.

Thoughts?

Thanks!

~Brad

*Developer Advocate*
*Ortus Solutions, Corp *

E-mail: brad at coldbox.org
ColdBox Platform: http://www.coldbox.org
Blog: http://www.codersrevolution.com
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